Potterton Gold HE A Range Installation & Service Instructions Manual page 33

Terminal Block Cover
Fig. 59
Cable Clamp
Fused Spur
L N
Room 'Stat
Fig. 60
Fused Spur
L N
Fig. 61
NOTE: The 230V switched signal for external controls
(Frost Stat - Room Stat - Timer) must always be taken
from terminal 2 at the boiler. Live, Neutral and Earth to
power these controls must be taken from the Fused Spur.
© Baxi Heating UK Ltd 2008
Facia Panel
N
230V
N
L
Frost Thermostat
Room 'Stat
230V
N
230V
External Clock
N
L
10.0 Installation
10.8
The boiler is fitted with a 1.3m length of 3 core cable. This
can be connected to the fused 3A 230V 50H
NOTE: Both the Live and Neutral connections are fused.
To connect an external control proceed as follows:-
1. Slacken the facia panel securing screws and lift the
outercase panel so that its securing tabs are clear of the
facia. Remove the panel.
2. Completely undo the screws securing the facia panel and
hinge it down (Fig. 58).
3. Undo the terminal block cover securing screw and
remove the cover (Fig. 58).
Fig. 58
4. Slacken the unused cable clamp on the LH side of the
boiler chassis (Fig. 59). Insert the external control wiring
through the clamp and route it to the terminal block.
5. Refer to the instructions supplied with the control.
IMPORTANT: The room thermostat MUST be suitable
for 230V switching.
NOTE: An external frost thermostat cannot be used
with the optional integral timer.
6. Remove the link between terminals 1 & 2. The 230V
bk
1
supply at terminal 2 must be connected to the thermostat.
bk
2
The switched output from the thermostat must be
connected to terminal 1 (Figs. 60 & 61). If the room
g/y
thermostat being used incorporates an anticipator it MUST
be wired as shown in Figs. 60 & 61.
b
7. Ensure that the external control input cable(s) have
br
sufficient slack to allow the control box to drop down.
Tighten the cable clamp on the boiler chassis.
8. Replace the terminal block cover, routing the external
control input cable(s) through the second cut-out.
10.9
1. Prior to commissioning the boiler preliminary electrical
system checks should be carried out.
bk
1
bk 2. These should be performed using a suitable meter, and
2
include checks for Earth Continuity,
g/y
Resistance to Earth, Short Circuit and Polarity.
b
br
Making The Electrical Connections
Preliminary Electrical Checks
supply.
Z
33